CN201779304U - Pneumatic rubber tube valve - Google Patents

Abstract

The utility model discloses a pneumatic rubber tube valve, which comprises a spherical valve body; a fluid channel is formed in the middle of the spherical valve body; an inlet and an outlet are formed at the two ends of the fluid channel respectively; a rubber tube is arranged in the fluid channel and is glued with the inner wall of the fluid channel; an air inlet and an circumscribed air source are arranged on the side walls of the spherical valve body; and a gap is reserved between the spherical valve body and the rubber tube to form a closed air cavity. The pneumatic rubber tube valve provided by the utility model has the advantages of simple and compact structure, large sealing area, long service life and excellent utility value, and is convenient to operate, mount and maintain.

Description

Pneumatic rubber pipe valve

Technical field

The utility model relates to a kind of pneumatic rubber pipe valve.

Background technique

Rubber pipe valve is a valve head with elastic valve body, and this elastomer valve physical efficiency is pushed together by a mechanism or process fluid pressure, or is called " compressing ".In most of the cases, elastomer is the complete lining of a simple lining at whole flow channel inside and flange.Lining completely cuts off all moving elements and logistics layer, and the parts that do not contact with solid just can be by more cheap material like this, for example carbon steel manufacturing.Because logistics is all contained by that cover of planning, so this type of has increased the benefit that does not need stuffing box again.

When the rubber pipe valve seal with buss, its sealing is large-area, then is a simple seal point to other most of valves.Because this characteristics, big object or shot can be contained in the sealing area of valve, and still keep sealing.Reason for this reason, rubber pipe valve can desirable being used to contain granule fluid or alkene slurry, for example food industry, contains sand water system, sewage treatment, non-manufacturing process water, particle logistics etc.Because the rebound elasticity relevant with elastomeric bushing effectively resisted because the wearing and tearing of solid particle by causing lining.Simultaneously according to the material selection of lining, sebific duct can be good at using the medium of those or erode metallic surfaces especially.

The major limitation of rubber pipe valve is because the temperature and the pressure of elastomeric bushing are limit, and he can only be used for the lower pressure operation.Because plain bushing material (tetrafluoroethylene, neoprene, buna-N and carbon fluorine rubber) also relates to rubber hose, the pressure rating that is used for the rubber hose of rubber pipe valve has replaced the pressure rating of common valve.Though it is the elastomer pressure rating is low, single through using special lining or valve body structure can improve these pressure limit.For example, use the rubber bushing that has wire netting in the rubber, or around lining, increased pressure limit with the pressure of offsetting the operation logistics such as a kind of external fluid (under the pressure).

Another kind of restriction is to work as valve at open position, when if the pressure in the process system thinks that vacuum moves or produces high pressure and falls, unless being actually, lining is installed in outside the closure member, then lining can be damaged by pressure, it is also poor that rubber pipe valve is worked in the pulsation logistics, is to cause too early damage because of frequent expansion of lining or contraction.When rubber pipe valve is used for when fluid operated, liquid must have some fluid motion, because the large size sealing area of lining makes displacement of fluid.Incompressible performance of liquid makes lining produce additional strain and causes lining to break in addition.

For straight-line pass and interference-free logistics, the pressure of rubber pipe valve falls very little or does not have, can desirable being used to out---close operation.Because they are low voltage operated through being usually used in, so their throttlings easily and the flow control that provides at 50% stroke place to the last.Knowledge is because the smooth inner wall of lining and rebound elasticity and early know minimum 50% place, to avoid using invalid general of whole strokes.

For the operating mode (special in sharp-pointed particle) of very abrasion, recommending accurate side is not carry out throttling near the valve closing place, produces the groove that can cause potential row because shot can corrode lining.Lining be that its smooth wall peace and stability flow divert produces minimum turbulent flow or pipeline vibration on the other hand.Elastic lining also can obtain tight the closing of bubbling easily.

Most rubber pipe valve is to wake up with a start operation through air or methods such as other liquid or use pneumatic operator such as band pressure.They also can automations and are used as control valve.Common chi 2-12in of rubber pipe valve (DN50 is to DN 300) and ANDI150 level (PN16).

The model utility content

The purpose of this utility model provides a kind of pneumatic rubber pipe valve, improves the sealability and the working life of rubber pipe valve.

The technical solution of the utility model is as follows:

A kind of pneumatic rubber pipe valve, include spherical valve body, the middle part of described spherical valve body has the fluid passage, the two ends of described fluid passage are respectively inlet/outlet, it is characterized in that: be provided with rubber pipe in the described fluid passage, the inwall of described rubber pipe and described fluid passage fits, described spherical valve body sidewall be provided with suction port and external source of the gas; Have the gap and form airtight air cavity between described spherical valve body and the described rubber pipe.

The beneficial effects of the utility model:

The utility model is simple in structure, compact, and sealing area is big, and is easy to operate, is convenient to installation and maintenance, and long service life has good use value.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

Referring to Fig. 1, a kind of pneumatic rubber pipe valve, include spherical valve body 1, the middle part of spherical valve body 1 has fluid passage 2, the two ends of fluid passage 2 are respectively inlet/outlet, be provided with rubber pipe 3 in the fluid passage 2, rubber pipe 3 fits with the inwall of fluid passage 2, spherical valve body 1 sidewall be provided with suction port 4 and external source of the gas; Have the gap and form airtight air cavity 5 between spherical valve body 1 and the rubber pipe 3.

External source of the gas is inflated spherical valve body by suction port, and the air pressure in the spherical valve body increases gradually, under the effect of gas pressure, and the generation of rubber pipe distortion, and shrink to the center gradually, until cutting off the fluid passage fully, reach the purpose of valve closing; To external venting, the air pressure in the spherical valve body reduces spherical valve body gradually by suction port, and rubber pipe begins to recover under the effect of self tension force, and is unimpeded fully until the fluid passage, reaches the purpose of valve opening.

Claims (1)

1. pneumatic rubber pipe valve, include spherical valve body, the middle part of described spherical valve body has the fluid passage, the two ends of described fluid passage are respectively inlet/outlet, it is characterized in that: be provided with rubber pipe in the described fluid passage, the inwall of described rubber pipe and described fluid passage fits, described spherical valve body sidewall be provided with suction port and external source of the gas; Have the gap and form airtight air cavity between described spherical valve body and the described rubber pipe.

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